I don't understand your post. X-ray machines do not produce any visible light. Now the phosphors in the viewing screen do create an image but that is something entirely different. How would you propose using such a machine?

A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

I don't understand your post. X-ray machines do not produce any visible light. Now the phosphors in the viewing screen do create an image but that is something entirely different. How would you propose using such a machine?

Sorry for the confusion - there are a lot of X-ray sensitometers available on the market for very cheap - $50 or less in working condition.

Answer is yes, no, maybe, with the caveat of how much do you want to spend. And are you confusing sensitometer with densitometer?

do they do the same thing-- yes
will it give an accurate result--no
can you swap LED's---maybe-- but you will have to recalibrate the entire machine for the new light source, how much are you willing to spend?

* Just because your eyes are closed, doesn't mean the lights in the darkroom are off. *
* When the film you put in the camera is worth more than the camera you put the film in... *
* When I started using 8x10, it amazed me how many shots were close to the car. *

Sensitometers - will an X-ray unit work for film testing?

Originally Posted by Jeff Searust

Answer is yes, no, maybe, with the caveat of how much do you want to spend. And are you confusing sensitometer with densitometer?

do they do the same thing-- yes
will it give an accurate result--no
can you swap LED's---maybe-- but you will have to recalibrate the entire machine for the new light source, how much are you willing to spend?

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Don't abandon the idea of having a sensitometer just because a "calibrated" system is out of reach. Being consistent can be just as good as being "right." For example, with my uncalibrated EG&G and uncalibrated Macbeth TR524, I have been asking myself (and in some threads) whether my results are really 2/3 stop away from where I thought they were. But my results for any film/developer combination are satisfyingly consistent with each other.